Home / 642,547.62-886,738.59-387,849.06

Finding the Fourth Proportional to 642,547.62, 886,738.59 and 387,849.06

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Solution

The fourth proportional to 642,547.62, 886,738.59 and 387,849.06 is: 535,245.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,547.62 : 886,738.59 = 387,849.06 : x
  2. Step 2: Convert to fraction form
    642,547.62/886,738.59 = 387,849.06/x
  3. Step 3: Cross multiply
    642,547.62x = 886,738.59 × 387,849.06
  4. Step 4: Simplify right side
    642,547.62x = 343,920,728,597.23
  5. Step 5: Solve for x
    x = 343,920,728,597.23/642,547.62
  6. Step 6: Final answer
    x = 535,245.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.